Machine for drawing bars



(No Model.) A

i "J-;GR1FF1N. MACHINE F03. DRAWING BARS.

AI aAzmlte-d Feb-12, 1884.

ATTORNEYS.

`f UNITED STATES` PATENT OFFICE.

JOHN s. lGRIFFIN, OF oLEvELAND, AssIeNoE ro HIMsELFAND MATHEW y EOLEYN, oF` NEwEUHG, OHIO.

MACHINE FOR DRAWING BARS.`

SPECIFICATION forming part of `Inetters PatentNo. 293,450, dated February 12, 1884. Application filed April 18, 1883. (No model.)

T0 all whom it may concern: y Be it known that I, JOHN SGHIFFIN, of

Cleveland, Cuyahoga county, and State of Ohio, have invented a new and Improved Ma- 5 chine for Drawing Bars for Heavy Shafting, of which the following is a full, clear, and exact description.

The obj ect of my invention is to provide a `new and improved machine for drawing iron and steel bars for heavy shafting in one continuous operation. 4 Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure lis a longitudinal elevation of my improved machine for drawing bars for heavy shafting. Fig. 2 is a cross-sectional elevation ofthe same on the line x x, Fig. l. Fig. 3 is a longitudinal elevation of the bar, showing the arrangement of the dies on the same. Fig. 4 is a plan view of the sliding carriage for holding the end of the bar. Fig. 5 is'a I plan view of amodiiieation of the same. Fig. 2 5 6 is a front end elevation of the same. Fig. Z

is a longitudinal elevation of the saine. Fig.

' 8 is a plan view of the gate-bar for holding the die-blocks in place. Fig. 9 is alongitudinal elevation of a die-block provided with two 3o dies" Fig. 10 is across-sectional elevation of the sameV on the line y y, Fig. 9. I Fig. 11 is a front elevation of the die-block, containing a suitable die.

l A frame, A, is constructed with a horizon- 35 tal track, A', on which the carriages `B can slide, in which carriages theV end of the bar to be drawn is held. A longitudinal driving` shaft, C, is journaled in suitable standards at the side of and parallel with the frame A, and projects beyond the end of the machine, which shaft is rotated from a suitable motor by means of suitable appliances. Near each end of the shaft C a beveled cog-wheel, Q', is mounted loosely thereon, which is provided on one side with beveled teeth and on the opposite side with a notched clutch-wheel, C2, adapted to engage with a sliding clutch-wheel, C3. This `latter wheel C3. is secured on the shaft G in such a manner that it must rotate with the `5o same, but can slide longitudinally, which sliding clutch-wheel C? is provided with an annular groove, into which a bifurcated prong, d, passes. "Said prong is formed on the lower y end of a centrally-pivoted lever, D, pivoted to the frame A, which lever D has its top and 5 5 bottom ends connected by connecting-rods d' and d2, respectively, with a series of like levers,

D. These levers D are pivoted centrally near the middle of the frame A, and are connected by rods d3, and provided with upwardly-pro- 6o jecting handles D2, so that if one handle D2 is swung in one direction or the other the ley vers D and D will be swung in the same direction, and will all be operated simultaneously. The loose-beveled cog-wheel C engages 65,- with a-beveled cog-wheel, E, mounted on one end ofa transverse shaft, E', on the opposite end of which a pinion, E2, is mounted rigidly,

` which pinion engages with a large cog-wheel,

F, mounted on a transverse shaft, F', journaled 7o in the frame A, near one end of the same. On y this shaft F' a sprocket-wheel, F2, is rigidly mounted, over which a chain, G, passes, which is coupled to one of the sliding carriages B.

A sprocket-wheel, G', is mounted on a shaft, 7 5 G2, journaled in vertically-movable standards above the wheel F2, so that the female sprocketwheel G' can press down on thelinks ofthe chain G and hold the same in place on the sprocketwheel F2. The upper journal-box, G3, Mof the 8O shaft G2,is pressed downward by spiral springs g, surrounding suitable standards, h, which spiral springs permit the female sprocketwheel G'- to give upward. The journal-boxes of the shaft G2 can be adj usted higher or lower, 85 as may desired, and as circumstances may require, by means of a key or wedge, g', passing through the frame, in which the j ournal-boxes G3 rest, below the saidl journal-boxes. I The movement of the chain G can rotate the female 9o sprocket-wheel G' 5 but, if desired, acog-wheel, g2, can be mounted on the shaft G2, and can engage with a cog-wheel, g3, mounted on the shaft F', whereby the female sprocket-wheel G will be operated from the shaft F'. 95 i I have described one end of the machine only, as the ends are alike.

At themiddle of the frame A two standards or upright frames, A", are formed on each side, in each of which frames A2 a vertical right and Ioo left hand screw-spindle, H, is journaled. VThis l in the raised position.

latter is provided at its upper endwith a crank-handle,` H', and with a beveled cogwheel, H2, engaging with a beveled cog-wheel, H2, on a transverse shaft, I, journaled in the upper parts of the standards A2, whereby if one screw-spindleltl is turned by means of its crankhandle H.' the opposite corresponding spindle H will be turned likewise. The screw-spindles H pass through apertures j in the ends of gatebars J, of which gate-bars all have a lug, J'. The gate-bars J are so arranged in relation to the vertical screw-spindles Hthat the left-hand threaded part passes through the end of one gate-bar, and the righthand threaded part passes through the end of the other gate-bar, as shown in Fig. 2, where-- by when the said spindles are revolved the gate-bars will be separated or moved toward each other. Between the gate-bars the dieholders K are held, each of which is provided with one or two apertures for receiving tubular dies L, which are preferably made tapering on the inner and outer sides. If desired, the dies can be held in. place in the die-holders lby means of keys or wedges. .The dieholders can lbe provided with one die or with two'dies, as may be desired. The dies are of various sizes, as in an ordinary rolling-mill, through which dies the bar is successively passed as it decreases in diameter. The dieholders K are to be clamped between the gate bars J, by turning the spindles H more or less. The carriages B, for receiving the ends of the bars, are provided with side grooves, b, for receiving longitudinal side projections, a, -on the tracks A', so as to guide thecarriage during its movement. The carriage is also provided ,on each side with a beveled lug, M, adapted to strike against the handle D2 and operate the same in the manner described hereinafter. The carriage is provided in its upper surface with a recess, N, for receiving the neck or narrow part of the end of the bar O, which recess or groove N terminates at its inner end in an enlargement, l?, for receiving the head 0', formed on the end. of the bar, which head rests against the shoulder formed at the union of the grooves N and I.

If desired, the carriage B can be provided with two grooves N,\as shown in Fig. 5. A frame, Q, is held on the front part of the carriage, and in the said frame a shaft, Q', is journaled, which shaft is provided at one end with a handle, Q2, and crosses the grooves N, and on which shaft a cam, R, is rigidly mounted above each groove N, whereby, by turning the handle Q2 up, the cams R will be pressed against the heads O in the carriages, and will thus firmly hold and lock the heads in the carriages. A rod, S, is held to slide in the frame Q parallel with the shaft Q', and is pressed in the direction toward the handle end of the shaft Q by a spring, S', surrounding the said rod S. The projecting end o f the rod S is formed or provided with a notch, into which the handle Q2 can be passed to hold it decreasing the diameter of the same. can be drawn into shafts in one continuous op- The rod -S is .provided with a handle, S2, for moving it in the direction of its length. The carriage B is provided with a suitable shackle, T, to which the end of the chain G is fastened.

The operation is as follows: The bars to be drawn into shafting are cnt the proper length, and the ends are? heated and reduced for a sufiicient length from the shoulder to the head O' to allow the thickest part of the bar to be drawn clear through the dies. The head is formed to pass through the dies and to fit into the recess or groove P in the carriages B, in

which they are locked by means Vof the cams will be closed and will hold one ofthe dies firmly. The upper gate-bar is provided with a lug, J', to press down upon' the die in the recess. The operator then pushes one of the handles D2 in the direction ofthe arrowa', whereby the lower ends of the levers D will be moved in the inverse direction of the arrow c', by which movements one of the clutchwheels Cs will be pressed against and into its clutch-wheel C2, and made to engage with the same, thereby rotating the beveled cog-wheels C' and E, the pinion E2, and the wheel F, whereby the sprocket-wheel F2 will be rotated in such a manner as to draw the chain G in the inverse direction of the arrow a', by which means the carriage B will be moved in the saine direction and will draw the bar through the die. Vhen the carriage B at the other end of the bar arrives at the handlelever D2, to the leftof the standards A2 in Fig. 1, the lugs M strike against the said handle-lever and throw it in the inverse direction of the arrow a', thereby moving the lower ends ofthe levers D D in the direction ofthe arrow a', and disenga-ging the cog-wheels C' at the right-hand end of the machine from the shaft. Then' the die-holder K, mounted on the left-hand end of the bar O, is held between the'gatebars J by turning the spindles H, and the levers D are thrown in the inverse 'direction of the arrow a', in order to engage the wheel C' at the lefthand end of the 'machine with the drivingshaft C. The left-hand chain G will then be drawn in the direction of the arrow e' and will draw the bar O in the same direction, thereby drawing it through the left-hand die and again The bars eration in the manner above described. If desired, two bars can be drawn at the same time.

when it has drawn the bar through a die it is stopped automatically.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination of the track A', the sliding carriages B B, having lugs M M, the shaft IOO IIO

The machine need only be started,and

C, carrying loose beveled cogflwheels C', and its integral notched clutchlwvheel C2, the keyed sliding annularly-grooved clutch-Wheel C3, the

. centrally-pivoted lever D, having bifurcated prong d, the levers D, having upwardly-projecting handlesDZ, and'connecting With-the ends of lever D by rods d d?, the transverse` shaft F', having cog-Wheel F,^the sprocketw Wheels F2 F, and the chain G, attached tosaid carriages, as shown and described.

2. The combination of the two right and left cranked screw-spindles" IIl H, the shafts I I,

gearing with said spindles, and the gate-bars J J, having lugs .If and apertures j', as and for the purpose specified.

3. A carriage, B, having a recess, N, terminating at its inner end in an enlargement,

JOHN S. GRIFFIN. Vitnesses:

A. HUrcHIsoN, MATTHEW BoLEYN. 

